(19)

(11)

EP 2 247 688 A2

(12)

(88) Date of publication A3: 22.10.2009 (43) Date of publication: 10.11.2010 Bulletin 2010/45 (21) Application number: 09703788.1 (22) Date of filing: 22.01.2009

(51) International Patent Classification (IPC):  C09K 8/32(2006.01) (86) International application number: PCT/US2009/031662 (87) International publication number: WO 2009/094425 (30.07.2009 Gazette 2009/31)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 22.01.2008 US 22705 (71) Applicant: M-I L.L.C. Houston, TX 77072 (US)	(72) Inventors: METTATH, Sashikumar Houston TX 77082 (US) YOUNG, Steven Cypress TX 77429 (US) (74) Representative: Giovannini, Francesca et al Osha Liang 32, avenue de l'Opéra 75002 Paris 75002 Paris (FR)